You are right - I missed it. Andrea, Please open a bug at bugzilla (https://bugs.openfabrics.org) - so that you will be notified as soon as I will fix SDP not use FMR if not supported.
As to fastreg_mrs support - I don't know this mechanism. Do you mean FRWR? Thanks, Amir On 04/14/2010 05:54 PM, Steve Wise wrote: > Hey Amir, > > I don't think this helps because sdp_add_device() will not add rdma > devices that fail to create fmr pools. > > So I guess you could key off of fmr pool failures and set > sdp_zcopy_thresh to 0 and allow the device to be used? > > But what we really need is sdp support for fastreg_mrs as an > alternative to fmrs. > > > Steve. > > > Amir Vadai wrote: > >> Hi, >> >> FMR are being used only in a special mode called ZCopy. >> >> You could disable this mode by setting the module paramter >> sdp_zcopy_thresh to 0, or by issuing: >> # echo 0 > /sys/module/ib_sdp/parameters/sdp_zcopy_thresh >> >> This means that you won't get the benefits of Zero-copy. >> >> - Amir >> >> On 04/14/2010 11:51 AM, Andrea Gozzelino wrote: >> >> >>> On Apr 13, 2010 10:22 PM, "Tung, Chien Tin" <chien.tin.t...@intel.com> >>> wrote: >>> >>> >>> >>> >>>>>>> Chien, does the NE020 support FMRs? I looked at the nes ofed-1.5 >>>>>>> code >>>>>>> and it appears to do nothing in the map_phys_fmr functions. >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>> We never implemented map_phys_fmr. Is it relevant to the # of SGEs? >>>>>> >>>>>> >>>>>> >>>>>> >>>>> No, but SDP uses FMRs. I don't think it will run without FMR support. >>>>> >>>>> >>>>> >>>>> >>>> Good to know. Thanks. >>>> >>>> Chien >>>> >>>> >>>> >>>> >>>> >>> Hi Steve and Chien, >>> >>> I understand that NE020 cards have problem with SDP connected with >>> map_phy_fmr (FMR stands for Fast Memory Region). >>> Is it possible to solve/fix this point? >>> If yes, have you an idea about the time that is necessary to code >>> development/build? >>> If no, can you suggest me a card that supports SDP protocol? >>> >>> I work on NE020 cards from February 2010 for an INFN experimental >>> proposal, called REDIGO (Read out at 10 Gbits/s), about the data >>> acquisition and movement systems. The covergence of storage protocols >>> around 10 Gigabits/s Ethernet protocols shows that one way could be the >>> Remote Direct Memory Access (RDMA). The goals are the investigations of >>> latency time, the throughput, the buffer size schemes and finally the >>> global event building bandwidth. >>> >>> Do you know if NE020 cards have problems with librdma (RDMA procedures, >>> in general) and / or with MPI versions? >>> >>> Thank you very much, >>> Andrea >>> >>> Andrea Gozzelino >>> >>> INFN - Laboratori Nazionali di Legnaro (LNL) >>> Viale dell'Universita' 2 >>> I-35020 - Legnaro (PD)- ITALIA >>> Tel: +39 049 8068346 >>> Fax: +39 049 641925 >>> Mail: andrea.gozzel...@lnl.infn.it >>> >>> -- >>> To unsubscribe from this list: send the line "unsubscribe linux-rdma" in >>> the body of a message to majord...@vger.kernel.org >>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>> >>> >>> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in >> the body of a message to majord...@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> Please read the FAQ at http://www.tux.org/lkml/ >> >> > > -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html